Yr 13 - Thermal Physics (1 of 2) Flashcards

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1
Q

Relationship Between Pressure and Boiling point

A

Pressure & Boiling point are proportional.

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2
Q

Triple Point of water

A

Temperature & Pressure where all phases of matter exist at thermal equilibrium.

0.01 ℃ & 0.61KPa

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3
Q

Formula between Celsius and Kelvin

A

T (K) = 𝞱 (℃) + 273

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4
Q

Heating

A

Transfer of energy from a region of higher temperature to one of lower temperature.

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5
Q

Does heat travel?

A

No, Object A heats Object B.

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6
Q

Does an object have heat?

A

No, Object A heats object B causing energy to travel from A to B.

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7
Q

Thermal Equilibrium

A

Where 2 or more regions have same temperature.
- Therefore, no heating occurs

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8
Q

What are Solid, Liquid and gas called?

A

Phases of matter

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9
Q

What are the 2 fixed points used to determine the Celsius scale?

A

Freezing and boiling point at one atmospheric pressure.

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10
Q

What are the 2 fixed points used to determine the Absolute temperature scale?

A

Triple point of water and absolute zero

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11
Q

△10K = ?

A

△10℃

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12
Q

What remains constant during a change In phase?

A

Average Ke (therefore temperature).

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13
Q

How to calculate internal energy?

A

Sum of Ek + Sum of Ep

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14
Q

Whats the triple point of water?

A

0.01℃

  • Where solid, liquid and gas can exist at the same time.
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15
Q

What is the absolute temperature scale?
What is the thermodynamic temperature scale?

A

Both are the Kelvin scale.

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16
Q

What does thermodynamic equilibrium mean?

A

No net heating occurs.

17
Q

What graph do you use to represent phase changes and heating?

A

Temperature (k) - Internal Energy

18
Q

What is heating?

A

Transferring energy from a region of higher temperature to one of lower temperature.

19
Q

What does ‘specific’ mean.

eg: specific heat capacity

A

Per unit mass

20
Q

What graph can you use to calculate the specific heat capacity.

A

Temperature Time

-> E = mc △𝞡
-> P = (mc△𝞡) / T
->P= mc x grad

(can just do △𝞡 / T as its the same thing)

21
Q

What is the latent heat when solid -> liquid

A

Latent heat of fusion

22
Q

What is the latent heat when liquid -> gas

A

latent heat of vaporisation

23
Q

What is latent heat?

A

Amount of energy per unit mass to change the phase of a substance while at a constant temperature.